Annex B of EN61000-3-3 says that both the switch on and switch off events should occur during each of the 1 minute tests.
Steve Seller York EMC Services On 25 Feb 03, at 9:26, [email protected] wrote: > > > We have a HP HFTS (harmonic and flicker test system) 6843A that runs the > original flicker tests. Now 61000-3-3 requires a measurement of dmax 24 > times, taking the average of 22 readings. We have come up with a way to do > that manually using the HFTS. I would like to present it to the group and > see if anyone sees an oversight or a better way of doing it. I suspect the > program is the same whether you have the 1kva model or the 5kva model 6843A. > > a) Create an Excel "template" to record 24 points of data. Create a formula > that sums the 24 values, subtracts the max and min, and divides the result > by 22. This value is the average dmax required by the amendment. > b) Set up the HFTS as follows: > Integration Periods: 1 > PST Int Time: 1 minute > Measurement Delay: 0 seconds. > c) Start the HFTS Voltage Fluctuation test with the EUT off. > d) After several seconds, manually turn on the EUT. > e) At the conclusion of the 1 minute test, record the dmax value reported > by the HFTS on the excel worksheet. > f) Turn off the EUT > g) Repeat steps c) to f) 24 times. > h) Compare the dmax value reported on the work sheet to the appropriate > limit in 61000-3-3, Amendment 1, 2001. > > This approach requires manual intervention and takes approximately 1/2 hour. > It appears to address the requirement of the amendment without requiring > modification to the unsupported test equipment. > > Comments? > > Don Umbdenstock > Sensormatic > DISCLAIMER NOTICE http://www.yorkemc.co.uk/Disclaimer York EMC Services, Market Square, The University of York, Heslington, York, YO10 5DD. VAT Reg No: GB 647 2055 41 Company Reg No: 3075474 York EMC Services Ltd is a Company limited by guarantee and not having share capital. This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
